Oscar Hernandez Jr., 23, is scheduled to appear today in a federal court in Orlando, Fla., for an initial appearance and detention hearing. He will later be brought to Massachusetts to face the charges.

Brian Fraga Herald News Staff Reporter @BfragaHN

FALL RIVER — A Florida man has been arrested on federal obstruction of justice charges stemming from an interstate gun trafficking investigation related to the Odin Lloyd murder case.

The federal investigation is connected to three firearms the Massachusetts State Police recovered while investigating Lloyd’s murder in the North Attleborough Industrial Park in June 2013, according to court documents released Thursday by the U.S. Attorney’s Office in Massachusetts.

Oscar Hernandez Jr., 23, was ordered to be detained after he appeared Thursday in a federal court in Orlando, Fla., for an initial appearance and detention hearing. He will be brought to Massachusetts to face the charges.

Hernandez — no relation to former Patriots tight end Aaron Hernandez, who is charged with Lloyd’s murder — is accused of lying to a federal grand jury that heard evidence last summer in the alleged interstate transportation of firearms from Florida to Massachusetts.

Oscar Hernandez, authorities allege, lied about not purchasing and shipping a gray Toyota Camry with Florida license plates that Massachusetts State Police investigators investigating Lloyd’s murder found in North Attleborough last summer. Prosecutors said Oscar Hernandez purchased the vehicle and arranged for it to be shipped to Massachusetts.

Bristol County prosecutors in the Lloyd murder case have also previously revealed evidence alleging that Ernest Wallace - Aaron Hernandez’s alleged “right-hand man” - purchased two .22-caliber handguns from a gun store in Florida and then brought them back to New England.

The federal indictment names two “John Does” who purchased two .22-caliber pistols last April from a True Value hardware store in Belle Glade, Fla. A third firearm — a 7.62x39-caliber rifle that police found inside the Toyota Camry — was purchased by a “John Doe No. 4” from a gun store in Delray Beach, Fla., on April 15, 2013, the indictment says.

None of those firearms is believed to be the murder weapon, which has not been found. Lloyd, 27, of Dorchester, was shot five times with a .45-caliber handgun, prosecutors said.

The federal indictment does not directly mention Aaron Hernandez, though it seems to make an oblique reference to him when it says the Massachusetts State Police executed a search warrant on June 22, 2013, at the North Attleborough residence of “John Doe No. 3.” Records in Attleboro District Court show that state police detectives executed a search warrant that same day at Hernandez’s house.

In February, Aaron Hernandez’s attorneys requested notes and interviews with Oscar Hernandez conducted by law enforcement officials outside of Massachusetts. The lawyers said Oscar Hernandez was potentially an “important witness” in the case, according to court documents.

In addition to allegedly misleading the grand jury, Oscar Hernandez is accused of trying to pressure a witness — a man identified in the indictment as “KS” — to change his testimony before the federal grand jury in Boston that heard evidence in the alleged gun-trafficking scheme.

If convicted, Oscar Hernandez faces up to 20 years on the witness tampering charges; up to 10 years on the obstruction charges; and up to five years on the false testimony charges.